How Theo Vanderway Was Related To The Young And The Restless' Abbotts

In 2019, siblings Jack Abbott (Peter Bergman) and Traci Abbott (Beth Maitland) were caring for their mother, Dina Mergeron (Marla Adams), who was in the late stages of Alzheimer's disease (via Soap Central). 

While going through some of her things, they found evidence suggesting she had a child while in high school that she had given up for adoption. They immediately began searching for their long-lost sibling, who turned out to be a man named Eric Vanderway — Theo Vanderway's late father.

After a DNA test confirmed that Theo was in fact biologically related to the Abbotts, Traci and Jack welcomed him into the family and even offered him a job at Jabot Cosmetics, according to Soaps in Depth. However, Kyle Abbott was less than impressed to find out he and his "frenemy" Theo had blood ties.

Theo was later introduced to Dina, who mistook him for his father, Eric (via Soaps). Dina asked her "son" if he had grown up in a good family after she had given him up for adoption. Theo played along to put the woman's mind at ease, not wanting to upset her with the information that her son had long since passed away. Instead, he insisted that he had a good life and was very happy.